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LF21235TMR

更新时间： 2024-11-18 21:11:59
品牌 Logo 应用领域
力特 - LITTELFUSE /
页数 文件大小 规格书
6页 660K
描述
Magnetic Field Sensor,

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中文翻译

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LF21235TMR 技术参数

是否Rohs认证： 符合生命周期：Active
Reach Compliance Code：unknown风险等级：5.75
Base Number Matches：1

LF21235TMR 数据手册

 浏览型号LF21235TMR的Datasheet PDF文件第2页浏览型号LF21235TMR的Datasheet PDF文件第3页浏览型号LF21235TMR的Datasheet PDF文件第4页浏览型号LF21235TMR的Datasheet PDF文件第5页浏览型号LF21235TMR的Datasheet PDF文件第6页 
High Sensitivity Low Power TMR Switch  
Position Sensing > LF11115TMR  
TMR Bipolar Switch 17 Gauss 200nA Push Pull Sensor  
Description  
The LF11115TMR TMR Switch is a digital bipolar magnetic switch that integrates  
TMR and CMOS technology in order to provide a magnetically triggered digital  
switch with high sensitivity, high speed, and low power consumption.  
It contains a TMR magnetic sensor and CMOS signal processing circuitry within  
the same package, including an on-chip TMR voltage generator for precise  
magnetic sensing, a TMR voltage amplifier and comparator plus a Schmitt  
trigger to provide switching hysteresis for noise rejection, CMOS push-pull  
output and X axis sensing direction.  
An internal band gap regulator is used to provide a temperature compensated  
supply voltage for internal circuits, permitting a wide range of supply voltages.  
It draws only 200nA (see Features below) resulting in low power operation,  
additionally it has fast response, accurate switching points, excellent thermal  
stability, and immunity to stray field interference. It is available in the SOT23-3  
package. The output of the LF11115TMR switches low (turns on) when the  
magnetic field parallel to the sensing axis exceeds the operate point threshold,  
BOP. When the magnetic field is reduced below the release point BRP device  
output switches high (turns off). The difference between the BOP and the BRP is  
the hysteresis BH of the device.  
Functional Block Diagram  
Vcc  
Power regulator  
with temperature  
compensation  
Offset  
TMR  
Sensor  
Features  
Vout  
Latch  
cancellation  
• X axis sensing direction  
• Tunneling Magnetoresistance (TMR)  
technology  
• Ultra low power consumption at  
200nA  
• High frequency up to 50Hz  
• Operation with north and south pole  
• 1.8V to 5.5V operating range  
GND  
Benefits  
• Low switching points for high  
sensitivity  
TMR Switch Typical Applications Circuit  
• Wider airgap capability  
• Operates with smaller magnets for  
cost reduction  
• Excellent thermal stability  
• High tolerance to external magnetic  
field interference  
• RoHS compliant  
Vcc  
Vcc  
Out  
TMR  
0.1µF  
Applications  
Out  
• Proximity detection  
• Utility meters including gas and  
water meters  
• Speed sensing  
• Battery powered applications  
• Rotary sensing  
GND  
Output Behavior Versus Magnetic Pole  
GND  
Parameter  
Test Conditions  
Output (volts)  
Note: It is strongly recommended that an external bypass capacitor be connected in-close-  
proximity to the device between the supply and ground pins to reduce noise. The recommended  
value for the external bypass capacitor is 0.1μF.  
South Pole  
North Pole  
B > BOPS  
Low (On)  
High (Off)  
0 < B < BRPS  
Note:  
The output is “High” when power is turned on under zero magnetic field.  
When a S Pole approaches the pin 1 side, Vout will transition to Low.  
When a N Pole approaches the pin 1 side, Vout will transition to High  
© 2020 Littelfuse  
Revised: 02/20/20  
littelfuse.com  
Specifications are subject to change without notice.  
123456

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